Delta Embedded DVR Bedienungsanleitung Seite 68

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DIAGRAM6‐2DNS
ThecomputerwillanalysesthedomainnameconfiguratedinDVR,andreturntothecurrentIP,asthe
pictureshowsunderlinedinred.WhentheIPcorrespondtotheembeddedDVR’sIPinPublicinternet,
itmeanstheDDNSissettingright.Iftheyarenot,pleasecheckthenetworkconnectionofembedded
DVRandDDNSinformation.
6.2. PORTMAPPING
Portmappingismappingaportofoutsidewebhost’sIPaddresstoamachineinsideweb,andprovide
theservice.WhenuserconnectstotheportoftheIP,theserverwillautomaticallymaptherequestto
thecorrespondingmachineinsideLAN.
Withthefunctionofportmapping,wecanmapmanyportsofamachine’sIPaddresstodifferent
machines’differentportsinsideweb.Theportmappingcanalsohaveotherspecialagentfunctions,
likePOP,SMTP,TELNET,etc.
Theoretically,itcanprovidemorethansixtythousandports.
Forexample,ifwewanttomapawebserverwhichhasanIPaddressof192.168.111.10,wejustneed
toinputtheIPaddressandTCPport80intotheportmappingchartoftherouter.
Therearetwowaystomaptheport:UPnPfunctionautomaticallymapandmodifytherouter’sport
mappingchartbymanual.
6.2.1. UPNPFUNCTION
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